Should you shut off the water in your home if it's going to be really cold and you were not there?

Author: Alene Beatty  |  Last update: Sunday, April 12, 2026

To prevent damage to your home, it is advisable to turn off the main shut-off valve before going on a vacation. You can find the main valve in the basement, crawlspaces, concrete slab, or the attic. You might also find the main shut-off valve in a utility box near your front sidewalk.

Should I shut off water in extreme cold?

Leave the shut-off valve off all winter until consistently above freezing. Without this, any water in the pipe leading outdoors will freeze and burst the pipes, causing major damage inside the wall and inside your home. Even those in warmer climates should do this if expected to get below freezing.

Is it a good idea to shut off water to the house?

Turning off the main water supply is generally safe and is often necessary for various situations, such as repairs or maintenance. Here are a few considerations: Purpose: If you're fixing a leak, replacing fixtures, or winterizing your home, it's advisable to turn off the main supply to prevent water damage.

Should I turn my water off when I go on vacation in winter?

Home Tip Tuesday - Turning off your water while you're on vacation If you are leaving to go on vacation, it's a good idea to turn your water💧 off and drain all the water from your pipes. This is important to do especially in the colder❄️ months to prevent the water in your pipes from freezing and bursting your pipes.

Will shutting off water keep pipes from freezing?

Shutting off the water will not keep the pipes from freezing. The water in the pipes could still freeze and burst the pipe. However, shutting off the water can prevent or reduce water damage when a pipe bursts due to freezing and causes water to f...

Which faucet should you keep dripping to prevent freezing pipes?

How warm should you keep your house to prevent pipes from freezing?

Here's a list of ways to prevent freezing pipes in your home: Keep the thermostat at a minimum of 68 degrees Fahrenheit. Make sure pipes are properly insulated.

Is it bad to shut off the main water valve?

First, locate the mains water supply valve in your home. You should know where this is anyway, in case there is a plumbing emergency. The valve should have a wheel control or lever handle to open and close it. It is perfectly safe to turn it off by either turning the wheel clockwise or closing the lever.

At what temperature should you shut off water?

During Freezing Weather

If you are away for any length of time shutting off the water can reduce the chance of a broken pipe. Leave the home's heat on to at least 55°. Shut off water to the house and open all faucets to drain pipes; flush the toilets once to drain the tank but not the bowl.

Can I shut off the water to my house and safely leave the water heater on while I'm away on vacation for a week?

If you decide to turn your water heater off for vacation, it might be a good idea to test it beforehand. You could try turning it off and on over the course of a day to make sure it won't cause any problems. Otherwise, it's best to just leave it on for your time away.

Do I need to leave water running in cold weather?

When the weather is very cold outside, let the cold water drip from the faucet served by exposed pipes. Running water through the pipe - even at a trickle - helps prevent pipes from freezing.

Do I need to turn off the water heater when shutting off water?

If you are turning your water off to the house, it would be wise to also turn off the breaker on the water heater. That way if something did happen to leak and the water went below the element, it won't cause any damage to your water heater.

What to do before turning off water to house?

Relieve the pressure in the pipes by draining the water that's already in them. Turn on a sink located in the lowest level of your home, so water in the pipes from the floors above drain all the way down. Make sure to open both the hot and cold taps and run them until they empty completely.

Is it okay to turn off water to the toilet overnight?

Shutting off the water supply when leaving for an extended period can prevent potential leaks or flooding while you're away.

How to prepare your house for extreme cold weather?

Protect your pipes from freezing.

Pipes can freeze when temperatures drop below 32 degrees Fahrenheit. Insulate any exposed outdoor fixtures and keep your water hoses drained and stored in a garage or shed. Keep your cabinets opened to allow heated air to circulate the pipes and faucets dripping.

Should you drain pipes after turning off water?

After shutting off the main valve, ensure you drain the water from all the fixtures. In summer, the temperature of the water raises the pressure inside the pipes. If there is a crack, parts of your plumbing could burst. It is even more critical to drain hoses and faucets in the winter.

Is it okay to turn off the water heater in winter?

Your Pipes Could Freeze and Burst

If you turn off your water heater, your interior temperature will drop, leaving the water in your pipes susceptible to freezing. When the water in your pipes freezes, it expands and becomes ice. That ice creates blockages in your pipes and causes pressure to build.

Should I turn off water when going on holiday?

Yes, it is a good idea to switch off your home's main water supply during a holiday to prevent potential water damage from burst pipes or leaks. Locate the shut-off valve and turn it off before leaving for your trip.

Does shutting off water affect electric water heater?

Else, if you have a full water tank, and you need to turn off the water for an issue unrelated to your water heater, then it really doesn't matter if you turn the water heater on or off. Call (702) 944-8838 Today or Book Online for Heating and Cooling Service!

Should you turn off water to the toilet before vacation?

Unless you turn off the water coming into your home, water sits in the pipes, waiting to be used by faucets, toilets and water-using appliances. If any of those lines fail from age, wear, corrosion or breaks, water will flow out at normal pressure just as if a faucet had been turned on.

Will my pipes freeze if I shut off the water?

Pipes can still burst in freezing temperatures even after you turn off your home's water. The pipes will still have water inside them, which means the water may freeze and potentially burst your pipes.

At what temperature is water dangerously cold?

Cold shock can be just as severe and dangerous from water temperatures of 50-60F (10-15C) as it is from water at 35F (2C). Gasping for a breath or rapid breathing from sudden immersion can be triggered by water as warm as 77F (25C).

Is it safe to shut off water to a house in winter?

Consider completely turning off the water supply if you will be away for an extended period of time. If your home is heated by an older steam heating system, consult with your heating professional to determine if it is safe to turn off the water supply for your particular heating system.

Do you need to turn off the water heater when shutting off water?

If you need to turn your water off for any reason, it's always safer to turn your water heater off, too. While many water heaters will be fine for a while without a water supply, reduced water pressure or a low water level inside the tank could cause the heater's components to overheat and burn.

What happens to pipes when water is turned off?

When you shut off a faucet, the water still has some force, which has to be absorbed, causing the pipe will flex. If the pipe is near wood, it will bang against the wood. You can stop this plumbing noise problem by installing water hammer arrestors on the offending water lines.

Should I open faucets when shutting off water?

Immediately after you turn off the main water valve, turn on a tub or sink faucet to its highest level, for both hot and cold connections. This relieves the pressure in the plumbing lines, and also ensures a full shut-down. Continue to open faucets around the house to drain down the home.

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